Ch'i and Ki

Ch'i noun - The circulating life energy that in Chinese philosophy is thought to be inherent in all things; in traditional Chinese medicine the balance of negative and positive forms in the body is believed to be essential for good health.

Ki is a synonym for ch'i. In some cases you can use "Ki" instead a noun "Ch'i".

Ki noun - A spiritual force that is held to emanate from or give animation to living beings.

Ch'i is a synonym for ki. You can use "Ch'i" instead a noun "Ki".